Heirloom cannabis strains refer to old, niche genetics that have been continually cultivated far from their original landrace origins, passed down intact for countless generations without any hybridization from breeding. Heirloom varieties reflect either pure indica or sativa lineage from specific geographic areas where landrace strains originally evolved. They have not been deliberately crossbred or genetically manipulated into hybrids. Growers simply multiply existing heirloom seeds naturally each season to propagate near-identical offspring maintaining nearly identical phenotypic expressions. Heirlooms are distinct from the vast array of engineered modern hybrid strains displaying specifically calibrated cannabinoid ratios, aromas, flavors, and effects. Seeking out these remaining heirloom genotypes offers cannabis aficionados diversity and new connoisseur-grade experiences grounded in heritage and botanical history. The original genotypes also contain a living snapshot of cannabis’ regional past before extensive human crossbreeding.